Adjustable shoe and shoe base for an adjustable shoe

ABSTRACT

An adjustable shoe configured to stand on a base surface, the adjustable shoe including at least one shoe sole; and at least one heel, wherein the at least one shoe sole is divided respectively into at least two shoe sole elements which are arranged at least indirectly behind one another in a longitudinal direction of the at least one shoe sole, wherein the at least two shoe sole elements include a toe element and a heel element, wherein adjacent shoe sole elements of the at least two shoe sole elements are respectively connected with each other by at least one joint arrangement, wherein the adjacent sole elements are pivotable relative to one another by the joint arrangement.

RELATED APPLICATIONS

This application is a continuation of International Patent Application PCT/EP2016/063240 filed on Jun. 10, 2016 and claims priority from German Patent Application DE 10 2015 109 136.4 filed on filed Jun. 6, 2015, both of which are incorporated in their entirety by this reference.

FIELD OF THE INVENTION

The invention relates to an adjustable shoe.

A movement of the heel is as a matter of principle any type of movement which is performed by the heel relative to the shoe sole. In particular the heel can be configured pivot able. It is furthermore conceive able that the heel is remove able and thus separated from the shoe according to the invention also this constitutes a movement of the heel.

A torque proof connection according to the invention means that the connection is configured by the respective link to absorb a torque. Put differently the connection does not release a relative rotation of the adjacent components but blocks this relative rotation at least substantially. The non-torque proof connection however facilitates a relative rotation of the respective components without significant force application.

The sole elements describe the individual elements of a shoe sole of the shoe wherein the toe element and the heel element respectively are sole elements according to the instant invention. Additional sole elements are conceivable thus it is not mandatory that the shoe includes exactly two or three sole elements. Another sole element according to the invention can be any sole element, thus also a toe element or a heel element.

A “link arrangement” according to the instant invention is an arrangement which facilitates at least a rotate ability of the adjacent components that are respectively connected to the link arrangement. A link arrangement of this type can be formed for example by a film hinge.

BACKGROUND OF THE INVENTION

Adjustable shoes of the general type recited supra are already known in the art. As a matter of principle there is a need to adjust a show between a high condition and a flat condition. This relates in particular to so called “high heels”, this means a particular type of ladies show whose heels are typically several centimeters tall.

The need to adjust a show of this type is based on the fact that shoes with high heels lead to problems and/or discomfort of the person wearing the shoe after a particular time period. Foot pain and back pain are typical symptoms. Accordingly after a certain time period there is a need to exchange the “tall shoe” against a flat shoe. An exchange of this type however is only possible when the respective person carries a second pair of shoes that is flat. It is appreciated that carrying a second pair of shoes is typically particularly complicated and therefore undesirable.

The adjustable shoe of the type described supra solves the problem in that the same shoe is adjustable between the recited positions. This removes the necessity to carry an additional pair of shoes.

Switching a shoe between a tall condition and a flat condition has the problem that the shoe sole has completely different shapes in both conditions of the shoe. While the shoe sole is strongly cambered in the tall condition of the shoe starting at a front end and going to a rear end of the shoe the shoe sole extends essentially flat or parallel to the ground in the flat condition of the shoe.

In order to able to implement these deformations of the shoe sole adjustable shoes typically include at least one pivot joint along the shoe sole. The pivot joint facilitates rotating adjacent shoe sole elements relative to each other so that overall the shape of the shoe sole is adjustable between a cambered tall shape and a relatively straight flat shape.

Adjustable shoes are known for example from WO 2007 09 76 16A1. This document describes a shoe in which the heel is pivot able about a rotation axis that is perpendicular to a longitudinal axis of the shoe. This way the heel is switch able between a tall position and a low position. In the low position a height of the heel which defines a distance between the ground and the heel portion of the shoe is much less than in the tall position of the heel. The shoe sole of the shoe illustrated in the recited document can change its contour due to a hinge.

The illustrated show however has the disadvantage that a stepping with the shoe onto the ground in the flat condition of the shoe creates an unstable condition. This is due to the fact that the heel or its heel surface by which the heel contacts the ground moves relatively far forward along the longitudinal axis of the shoe in the low position of the shoe. The load on the heel of the person bearing the shoe therefore has to be conducted through the shoe sole to the hinge of the heel and then through the hinge to the heel surface. A direct load reaction from the wearer's heel vertically downward into the shoe heel and into the ground cannot be provided by the shoe described in WO 2007/097616 A1.

An alternatively adjustable shoe is known from WO 2012107712 A1. The alternatively adjustable shoe includes a pivot able heel which is completely arranged within the sole of the shoe in a passive condition. The shoe includes two sole elements namely a forward short toe element and a rear long heel element. Both sole elements are connected with one another in a flexible manner. The disadvantage of the known show is its lack of stability which can become apparent through kinking of the shoe in particular when the shoe is in its tall condition. In particular both sole element of the shoe are not lock able.

Furthermore WO 2014/020175 A1 shows an adjustable shoe. The adjustable shoe includes a three piece sole and is configure able with different heels. For this purpose the shoe includes an attachment arrangement which is configured to cooperate with different heels using form locking. It is a disadvantage of the known shoe that the at least one heel has to be stored separately in any case. This embodiment reduces the acceptance of an adjustable shoe considerably since in any case several individual components are required in order to be able to facilitate the switch ability of the shoe between “high” and “flat”.

Last not least reference is made to U.S. Pat. No. 5,309,651 which also shows a generic shoe. Differently from WO 2014 020 175 the heel in the illustrated shoe is permanently connected with the shoe and can be moved by folding the heel in and out which renders the shoe adjustable. It is a disadvantage that the shoe contacts the ground in its flat condition only with a rather small total surface and therefore the shoe is rather unstable. In particular the section of the shoe sole cannot be used for contacting the ground that is arranged below the folded in heel.

BRIEF SUMMARY OF THE INVENTION

Thus it is an object of the invention to provide an adjustable shoe which is “stable” in its tall condition as well as in its flat condition, this means its inclination is reduced to laterally or longitudinally kink out during load introduction compared to the prior art when the heel is stepped on by a foot.

The object is achieved by the adjustable shoe described supra in that a heel surface contacts the ground directly in a passive position of the heel.

The object is achieved by an adjustable shoe configured to stand on a base surface, the adjustable shoe including at least one shoe sole; and at least one heel, wherein the at least one shoe sole is divided respectively into at least two shoe sole elements which are arranged at least indirectly behind one another in a longitudinal direction of the at least one shoe sole, wherein the at least two shoe sole elements include a toe element and a heel element, wherein adjacent shoe sole elements of the at least two shoe sole elements are respectively connected with each other by at least one joint arrangement, wherein the adjacent sole elements are pivotable relative to one another by the joint arrangement, wherein at least the heel element and at least one shoe sole element which is adjacent to the at least one heel element are connectable torque-proof in at least one interlocking position in a tall condition of the adjustable shoe, wherein the heel is movable relative to the at least one shoe sole at least between an active position and a passive position so that the adjustable shoe is adjustable at least between the tall condition and a flat condition, wherein the at least one shoe sole includes a heel compartment in which the heel is storable in a passive position of the heel, wherein a heel surface which is arranged at a bottom side of the heel element which faces the base surface is offset from the base surface in the active position of the heel in which the heel is arranged in a force transmitting manner at least at the heel element and contacts the base surface with a heel surface, and wherein the heel surface is in direct contact with the base surface in the passive position of the heel.

In order to provide an alternative adjustable shoe which is “stable” both in the tall condition and in the flat condition, it is proposed according to the invention that the heel surface is in direct contact with the base surface when the heel is in the passive position.

The term “directly” in this context can be interpreted so that the heel surface of the shoe sole is not offset from the ground by the heel or a heel component as it is the case in WO 2007 097616 A1. However it is appreciated that it is not detrimental for a “direct” contact according to the instant application when the shoe heel surface is provided in a flat condition of the shoe with an additional element or similar. In this case the shoe heel surface is formed by an applied element put differently the heel surface is not limited. Put differently the shoe heel surface is not limited to the surface which is oriented at the shoe heel in the heel element towards ground.

The term “shoe heel surface” is as a matter of principle independent from the walking surface in the portion of the shoe heel by which the shoe according to the invention contacts the ground in its flat condition in the portion of the heel element. It is conceive able in particular that the described heel compartment is at least partially arranged in the heel element and closed in downward direction by a cover flap. In this case the running surface in the portion of the shoe heel element can be partially formed by the shoe heel surface itself and partially by the cover flap which is at least partially arranged at the heel element, however which as a matter of principle is not part of the heel element as such. Also in this case the shoe heel element with its shoe heel surface is in direct contact with the ground which is essential to practice the invention.

It is also conceive able that the heel element in its passive condition is still in contact with the ground, this means that the shoe in its flat condition stands on the ground in addition to the shoe heel surface in addition to the shoe heel surface on the ground. Also this is irrelevant for practicing the invention since the load reaction is at least partially advantageously mostly by the shoe heel surface. It is conceivable in particular that the heel element starting from its active position is pivoted or folded into a passive position, wherein a surface of the heel which is oriented vertical in an active position of the heel is oriented horizontal in a flat condition of the heel and comes in direct contact with the ground, wherein the surface terminates for example flat with the shoe heel surface of the shoe heel element. In spite of this conceivable configuration of the shoe according to the invention it is particularly advantageous when the heel element in its passive position is completely insulated from the ground, this means when the shoe in its flat condition impacts the ground, the heel element does not come in contact with the ground.

The “flat” condition of the shoe according to the invention describes a condition in which the shoe is configured to contact the ground directly with its shoe heel surface. The flat condition does not require any special adjustment of the link arrangement or similar. The passive condition of the heel element and the flat condition of the shoe thus cause each other. Advantageously the shoe when provided in its flat condition contacts the ground with at least 70% advantageously at least 80% further advantageously at least 90% of its entire sole surface, wherein the sole surface represents the surface of the shoe sole that is oriented towards the ground.

The shoe according to the invention has many advantages since the shoe heel surface contacts the ground the stability of the shoe according to the invention is significantly improved over prior art shoe. In particular a load transfer can be provided directly from a heel of a person wearing the shoe directly through the heel portion of the shoe sole into the heel surface and then into the ground. This load reaction is typically provided at least essentially, advantageously exclusively vertically. A “rerouting” of the load is not necessary.

A contact of the shoe according to the invention on the ground with its heel surface typically has the consequence that the shoe in its flat condition actually has a flat shape. Put differently a bottom side of the shoe sole in the flat condition of the shoe according to the invention is typically parallel to the ground. The shoe is therefore arranged flat and contacts the ground at least substantially with its entire surface. In this flat condition the shoe according to the invention can also be designated as “ballerina”

The described shape of the show according to the invention in tis flat condition is particularly advantageous but not mandatory. In order to practice the invention, this means increase the stability of the shoe in its flat condition it is only relevant that the heel surface of the heel element is in contact with the ground. Put differently the heel portion according to the invention does not contact the ground exclusively with a heel element arranged there between as it is provided in the prior art document described supra.

However for example the heel portion of the shoe sole in itself can be configured for example wedge shaped so that the described contact between heel surface and ground is provided but a contact surface or foot surface where a foot of a person wearing the shoe contacts the shoe is not parallel to the ground. Typically surfaces of shoes designated as foot surfaces are not configured completely parallel but rise slightly from the toe portion to the heel portion, wherein the slope of the foot surface can rise for example over the length of the shoe. It is also conceivable that the slope of the foot surface rises and falls over the length of the shoe in an alternating pattern or remains constant at least in sections.

Advantageously the shoe is configured as so called all in one shoe in which no components or individual components have to be transported and/or stored externally. Instead it is possible to carry all components of the shoe directly at or in the shoe, in particular store the heel in a heel compartment independently from the remaining embodiment of the shoe according to the invention which is advantageously configured so that the heel is store able within the heel compartment substantially completely, advantageously completely. This way the heel of the shoe in the flat condition, this means the heel is in its passive position is at least essentially advantageously completely invisible. The all in one configuration of the shoe has the consequence that all components of the shoe are supported in or directly at the shoe which components are required for adjusting the show between its two conditions thus the tall and flat condition. Advantageously additionally all components are supported in or at the shoe which are required for an advantageously embodiment of the shoe.

In an advantageous embodiment of the shoe according to the invention sole surfaces of the individual sole elements are in direct contact with the ground in a flat condition of the shoe with at least 70% of their sole surface, advantageously with 80% of their sole surface, further advantageously with 90% of their sole surface. It is appreciated that foot contact surfaces of the shoe which are indirect contact with a foot of a person wearing the shoe while the shoe is in use are at least essentially oriented parallel to each other and only shaped according to the geometric shape of the foot. In this condition the shoe according to the invention has the form of a ballerina shoe in the flat condition of the shoe.

The “sole surface” is the bottom side of the shoe that is oriented towards the ground. It is not necessary that the sole surface is in contact with the ground when putting on the shoe instead it can be offset from the ground. A part of the heel and/or a cover part can also be a part of the sole surface.

“Direct contact” of the foot surface with the foot of the person wearing the shoe is certainly also a contact where the foot of the person and the foot surface of the shoe are separated from each other by a thin textile, in particular a sock or a panty hose. In case the foot itself is covered with a flexible textile of this type that adapts to the contour of the foot this textile forms the “foot” according to the preceding description.

Advantageously the shoe sole of the shoe according to the invention is divided into at least three sole elements, namely the toe element and the heel element and a center element arranged between the toe element and the heel element. Thus it is not mandatory that the toe element and the heel element and the center element are in direct contact with each other; in particular one or plural additional sole elements can be provided with are arranged between the recited sole elements.

Though additional sole elements can be provided it has become apparent that dividing the shoe sole into a total of three sole elements is particularly useful. As described supra subdividing the shoe sole to adapt the shoe sole into the contour of the foot into the different condition of the shoe. In particular the shoe sole in the tall condition of the shoe is highly cambered, typically with the characteristic curve of a high heel. In flat condition the shoe sole however is rather flat. Subdividing the shoe sole into the described sole elements and the option to pivot the individual sole elements relative to each other facilitates adapting the shoe sole as a function of a condition of the shoe.

In a three part sole a sole surface of the center element is in direct contact with the ground when the shoe according to the invention is in its flat condition. Consequently in this embodiment the toe element the center portion and the heel portion contact the ground which increases a running surface of the shoe in particular; in particular a shoe of this type contacts the ground in its flat condition with a significantly larger surface than the shoe described in WO 20070976 16A1 described supra since the center piece according to the recited document is not in contact with the ground and furthermore the heel surface of the heel element is rather small. As a consequence the stability of the shoe according to the recited document is not as good as the stability of the shoe according to the invention.

Further configuring the shoe according to the invention the heel of the shoe in its passive position is at least partially, advantageously at least by 60%, further advantageously by at least 75% even further advantageously by 85% ideally completely arranged within the heel compartment. This means that the heel does not protrude at a bottom side of the shoe or the shoe sole, if the heel is in its passive position.

Thus it is particularly advantageous when the heel compartment extends in at least 2 sole elements, in particular in the heel element and in a sole element adjacent to the heel element. Thus it is appreciated that the heel compartment in a three piece embodiment of the shoe sole extends in the heel element and the center piece adjacent to the heel element. The configuration of the heel compartment into sole elements facilitates dividing the shoe sole independently from the heel compartment, in particular to make the division of the shoe sole exclusively independent from an optimum adaptability of the shoe sole to the contour of the foot in the tall position of the shoe.

In case the heel compartment extends exclusively in a single sole element this sole element can be advantageously formed by the heel element. A heel element of this type can at least be not subdivided any further along the length of the heel which can have a negative impact upon an optimum adaptation of the shoe sole to the foot. It is also conceivable that the heel compartment is exclusively arranged in the center element of the shoe. In this case the heel has to be configured remove able so that it can be inserted into the center piece of disengaged from the heel element.

The shoe according to the invention is furthermore particularly advantageously when the heel surface by which the shoe in its flat condition contacts the ground is at least 5 times advantageously, further advantageously at least 20 times the size of the heel surface by which the heel of the shoe in its tall condition contacts the ground.

The heel surface of the heel typically has a similar size even for different shoes. This applies in particular for high heels whose heels typically have a heel surface between 0.5 cm² and 2.0 cm². The recited ratios with respect to heel surface accordingly relate to the configuration of the heel element or the heel surface itself.

The recited sizes are thus advantageous in that a larger heel surface facilitates a more stable contact of the shoe or the heel element on the ground. In particular a surface pressure between the shoe heel surface and the ground is the lower the higher the heel surface. The better force distribution over the heel surface positively influences a safe stand of the person wearing the shoe.

Furthermore a shoe is particularly advantageous which includes at least one cover element which is configured to cover the heel compartment. This cover element protects the heel stored in the heel compartment against damage and contamination in case the heel is in its passive position.

Advantageously the cover element terminates flush with the sole surface of the shoe sole oriented towards the ground. A multi component configuration of the cover element can be advantageous in particular when the heel compartment extends over plural sole elements.

Advantageously a respective cover element is configured rotate able so that a side of the cover element that is oriented towards the ground can be changed between the tall condition and the flat condition of the shoe, in particular by rotating the cover element about an axis that is parallel to the shoe sole. This way the side of the cover element which is visible from a bottom side of the show when the shoe is provided in its tall position is not worn out when the shoe is provided in its flat position and thus optically disfigured compared to the running surface of a shoe. The side oriented towards the ground in the flat condition is then hidden in the tall condition of the shoe and is thus not optically perceivable.

In another embodiment of the shoe according to the invention in addition to the heel element also the toe element and a sole element adjacent to the toe element are fixable relative to each other, wherein the fix ability is provided at least in a kinked condition of the joint device. The kinked condition of the joint arrangement designates a condition in which the foot surface of the toe element and of the sole element adjacent to the toe element jointly enclose an angle which is less than 180°. Put differently when the joint arrangement is in its kinked condition a foot contacting the shoe is also in a kinked condition wherein the toes of the foot are rotated relative to the center of the foot.

The complementary angle of the angle which the foot surfaces of the toe element and of the other sole element enclosed with each other is at least 15°, advantageously at least 20°, further advantageously at least 25°.

The fixability is particularly useful since the shoe sole remains in its set shape when the shoe is lifted off from the ground, for example when the person wearing the shoe makes a step. Should the sole elements be freely rotate able relative to each other it can happen however that the sole elements rotate relative to each other as a function of their loading. This can be dis advantageous for the carry comfort and the stability of a respective shoe.

With respect to the fixability of the heel element relative to the sole element adjacent to the heel element the essential technical effect is in the stability of the shoe should the heel element and the additional heel element not be fixable relative to each other, this creates the substantial risk that the shoe starting from its tall position drops into its flat position in a non-planned manner. This can cause significant injuries of the person wearing the shoe. Furthermore it is disadvantageous for a relaxed gait and a relaxed walking through the lack of stability of the shoe since the foot of the person wearing the shoe has to distribute the step energy or the weight of the body over the shoe and thereafter the shoe yields, this means does not remain in shape. The latter is not initiated directly by the shoe heel starting from the person's heel into the ground.

In another particularly advantageous embodiment the fixing of the at least joint arrangement which connects the toe element with the respective adjacent sole element is performed in a manner so that the two effected sole elements can rotate relative to each other in spite of their fixation within a partial angle range. Put differently a rotate ability of the sole elements in spite of their fixation relative to each other is not completely blocked by the joint arrangement but only essentially blocked. A rotation of the sole elements is furthermore possible within the recited partial angle range. This partial angle range extends advantageously at the most over an angle of 55°, further advantageously only 45° even further advantageously at the most 35°.

Allowing a certain rotate ability of adjacent sole element within the recited partial angle range has the advantage that the shoe sole has the option to adapt the different load conditions which occur as a function of the varying situation. This means that the shoe obtains a certain flexibility which makes the show according to the invention wear more comfortably and which additionally has an orthopedic advantageous rolling properties. The described rotate ability of the sole elements within the described partial angle range is particularly advantageous when the shoe is provided in its flat condition.

It is appreciated that the described rotate ability of adjacent sole elements is provided even when the respective link arrangement is provided in an arresting position in particular for the toe element and for the sole element adjacent to the toe element. Thus a rolling of the shoe is possible during a step. For the heel element and the sole element adjacent to the heel element a rotate ability within a partial angle range can also be useful. However since the heel element reacts the substantial load of the foot a completely stiff connection of the heel element with the respective adjacent sole element is typically preferred for the reasons recited supra providing stability of the shoe.

Configuring the shoe according to the invention in more detail the shoe includes at least one slider element which cooperates with at least 2 sole elements and which is move able relative to at least one sole element, advantageously essentially parallel to the longitudinal direction of the shoe, wherein the movement of the slider element causes a change of a distance between locations of adjacent sole elements so that the adjacent sole elements perform a relative movement in the course of the movement of the slider element, in particular a rotation by the joint arrangement cooperating with the respective sole elements, wherein the slider element is arrest able in at least one position so that a relative movement between the respective sole elements is prevented. In particular the slider element can be permanently connected with one of the sole elements so that a translatoric relative movement between the slider element and the respective sole element prevented and can be connected with the other sole element only so that a translatoric relative movement is facilitated. In the course of the switching of the shoe thus configured the shoe sole can be performed manually, this means adjacent sole elements are rotated relative to each other under the effect of the joint arrangement wherein the slider element is moved relative to one of the respective sole elements in the course of the movement. By fixating the slider element in a “moved position” which corresponds in particular with a position of the respective sole elements which in turn corresponds to a tall condition of the shoe the “moved position” can be conserved which in the end fixates the link arrangement and consequently the shoe as such in a tall position.

In another advantageous configuration of the shoe according to the invention at least one link arrangement of the shoe is configured so that an adjustability of the position and orientation of the joint arrangement is possible. An adjustability if particularly advantageous which facilitates to adjust the angle of the shoe that is measured relative to the longitudinal axis of the shoe with the link arrangement that cooperates with the toe element so that the shoe is adjustable to the individual properties of the respective foot. This is based on the view that foot shapes of different people can be very different in particular with respect to the position and orientation of the toes relative to the forward foot pad. Thus the adjustability of the link arrangement facilitates adjusting the rolling properties of the shoes individually for a respective foot shape. Furthermore it is particularly advantageous when a position of the link arrangement is adjustable along the longitudinal axis of the shoe.

With respect to the configuration of the joint arrangement or the link arrangements the shoe according to the invention can be particularly advantageous when at least one link arrangement includes at least one shaft and at least interlocking pin. The shaft cooperates with the respective sole elements which are connected with each other by the respective joint arrangement. The shaft represents the joint by which the respective sole elements are rotate able relative to each other. The rotation axis typically coincides with the longitudinal axis of the shaft.

The interlocking pin is used for fixating the shaft in desired positions, wherein according to the preceding description also an arresting portion can be feasible which facilitates a rotation of the shaft about its longitudinal axis within the described partial range though the shaft is arrested by the interlocking pin.

In order to facilitate an arresting of the shaft the interlocking pin is move able between a free position and an arresting position along its longitudinal axis. In its arresting position the interlocking pin engages at least a groove or recess provided in the shaft. Through this engagement the interlocking pin blocks the shaft and prevents an undesirable rotation of the shaft.

For a groove whose length or width measured in circumferential direction of the shaft precisely corresponds to the diameter or the respective edge length of the cross section of the interlocking pin the shaft is completely fixated since it is directly blocked by the interlocking pin during a rotation about its longitudinal axis in any case, there is no movement clearance. A groove however whose length measured in a circumferential direction of the shaft is greater than the cross section of the interlocking pin facilitates a rotation of the shaft until the interlocking pin engages a respective wall of the groove. Thus the described partial angle range can be set in a particularly simple manner by a respective configuration of the groove in particular its length.

Advantageously the shaft includes at least 2 grooves, wherein the joint arrangement is fix able in different positions by alternative engagement of an interlocking pin in the two grooves. Advantageously the 2 grooves are arranged along the longitudinal axis of the shaft in the same position so that the two grooves are arranged in a common plane that is perpendicular to the longitudinal axis of the shaft. Thus the two grooves can be used by the same interlocking pin. It is appreciated that an arrangement is also conceivable where the grooves are arranged at different locations along the longitudinal axis of the shaft and can cooperate with different interlocking pins.

The installation of two grooves along the same shaft facilitates fixing the link arrangement in two different positions. In particular the respective sole elements cooperating with the joint arrangement can be fixated relative to each other when the shoe according to the invention is provided in its tall condition or in its flat condition.

Configuring the shoe according to the invention in more detail the heel is formed by at least 2 heel elements that are move able relative to each other. This way the heel can be transferred from an operating position into a stored position and vice versa. Advantageously an outer volume of the heel in its stored condition is smaller than in its operating condition.

This embodiment is based on the finding that the heel arranged in its passive position advantageously has a minimum volume since it is arranged in its passive position within the shoe sole of the shoe according to the invention. It is appreciated that the shoe sole accordingly has to have at least a corresponding thickness so that the heel can be arranged in the shoe sole in its entirety. The ability to dis assemble the advantageous heel described supra facilitates reducing the volume of the heel and to simplify its support within the shoe sole since the thickness of the shoe sole can be provided thinner than a maximum cross section of the heel in its operating position.

Advantageously the outer volume of the heel arranged in its storage position is 90% at the most, advantageously 80% at the most, further advantageously 70% at the most of the outer volume of the heel arranged in its operating position. In particular the heel can be configured so that it can be disassembled while remaining the shape of its individual heel elements, wherein the heel is disassembled in its stored condition and the individual heel elements can be folded into each other in a space saving manner so that the outer volume of the entire heel is reduced.

It is required for the shoe for the invention that the heel is configured move able so that it is transferable between its active position and its passive position. Thus it is insignificant for practicing the invention in which way the move ability of the heel is implemented. For example it is conceivable that the heel is dismounted from the remaining shoe in its entirety, in particular through threading. When transition the heel from its active position into its passive position the heel can be unthreaded for this embodiment for versa threaded on again. The unthreaded heel can then be inserted into the described heel compartment and is arranged in its passive position. As an alternative to a threaded connection any other connection options are conceivable.

In a particularly advantageous embodiment of the shoe according to the invention the heel is permanently attached at the shoe and pivot ably arranged at the shoe by a separate link arrangement. Transferring the heel between its active potion and passive position is performed by rotating the heel relative to the shoe sole. Thus it is conceivable as a matter of principle that a rotating movement of the heel is combined with a linear movement, a pure rotation is not mandatory however can be particularly advantageous.

A rotatable arrangement of the heel at the shoe is particularly useful with respect to a quick and simple configuration change of the shoe between its tall condition and its flat condition. Advantageously the shoe can be transferred with a few hand manipulations between its configurations and does not require any replacement heels or additional shoe spacers or similar.

In an advantageous embodiment of the shoe according to the invention the heel has a length of at least 5 cm advantageously at least 7 cm, further advantageously at least 9 cm.

Advantageously the mechanism is configured so that it does not form the complete shoe itself but only a part of a shoe, for example a sole inlay. Thus advantageously a shoe base is proposed for use as a base for an adjustable shoe, the how base including at least two base elements arranged behind one another in the longitudinal direction of the shoe, for example sole elements, and at least one joint arrangement which respectively cooperates with adjacent base elements so that the base elements are rotate able relative to one another about at least one joint axis of the joint arrangement, wherein the joint arrangement is fixable in at least one position so that the rotation of the components that cooperate with the joint arrangement and which facilitate the rotation is blocked, wherein the shoe base includes at least one heel compartment for receiving a heel, wherein the heel compartment is configured so that it can receive a heel essentially completely. Advantageously the shoe base furthermore includes at least one jack element by which the heel compartment is close able, advantageously so that a penetration of dirt into the heel compartment is prevented at least essentially. A shoe base according to the invention can be used for example as sole inlay for a shoe and can thus be used for a shoe upper structure or a shoe lower structure. The resultant shoe can thus be configured in a particularly simple manner as a shoe according to the invention according to the instant application. The shoe base thus acts as a kit for a shoe according to the invention.

It is appreciated that he shoe base according to the invention can be advantageously configured according to the shoe according to the invention, in particular the shoe base can be formed by three base elements which correspond accordingly with the respective sole elements of a shoe. Furthermore a shoe base can be particularly advantageous whose base elements at least have an essentially, advantageously completely flat bottom side in a first operating position. A shoe base of this type is particularly well suited to be used as a base for an adjustable shoe according to the invention which in its flat position when used as intended contacts level ground when stepped upon wherein the contact is performed advantageously completely with 70% advantageously with 80%, further advantageously with at least 90%.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a horizontal cross section through a shoe sole of a shoe according to the invention;

FIG. 2 illustrates a vertical cross section through shoe sole of the shoe according to the invention wherein the shoe is in its tall condition;

FIG. 3 illustrates a vertical cross section through a shoe sole of a shoe according to FIG. 2 wherein the shoe is in its flat condition;

FIG. 4 illustrates a horizontal cross section through a shoe sole of a shoe according to FIG. 1;

FIG. 5 illustrates a schematic view of an adjustment mechanism for a joint arrangement between a toe element and a sole element of a shoe according to the invention adjacent to the toe element;

FIG. 6 illustrates a detail of the adjustment mechanism according to FIG. 5 in top view;

FIG. 7 illustrates a detail of the adjust mechanism according to FIG. 5 in a side view;

FIG. 8 illustrates a schematic view of an adjustment mechanism for a joint arrangement between a heel element and a sole element of the shoe adjacent to the heel element;

FIG. 9 illustrates a detail of the adjustment mechanism according to FIG. 8;

FIG. 10A illustrates a schematic view of a flat condition of the shoe according to the invention that is provided with 3 sole elements, wherein joint arrangements of the shoe are fixable by arresting devices;

FIG. 10B illustrates a schematic view of a tall condition of the shoe according to the invention that is provided with 3 sole elements, wherein joint arrangements of the shoe are fixable by arresting devices;

FIG. 11 illustrates a detail of a joint arrangement of a heel of the shoe according to the invention;

FIG. 12 illustrates a detail of a joint arrangement which cooperates with two adjacent sole elements of the shoe according to the invention;

FIG. 13 illustrates a detail of a vertical cross section of a shoe according to the invention which is in a flat condition and whose heel compartment is provided with a cover element adjustable shoe

FIG. 14 illustrates a detail of the vertical cross section of a shoe according to the invention according to FIG. 13 which is arranged in its tall condition;

FIG. 15 illustrates a horizontal cross section of the shoe according to the invention whose heel compartment is provided with a cover element, wherein a top side of the shoe is illustrated;

FIG. 16A illustrates a detail of a heel arresting arrangement in a passive position;

FIG. 16B illustrates a detail of a heel arresting arrangement in an active position; and

FIG. 17 illustrates a heel that is formed by two heel elements in an operating position and in a storage position.

DETAILED DESCRIPTION OF THE INVENTION

A first embodiment that is illustrated in FIGS. 1-4 includes a shoe 1 according to the invention which includes a total of three sole elements 4. The sole elements 4 are respectively connected with one another by joint arrangements 8 wherein a respective joint arrangement 8 cooperates with two adjacent sole elements 4. The three sole elements 4 are formed by a forward toe element 6, a center element 13 and a rear heel element 7.

The three sole elements 4 are thus arrange directly adjacent and behind one another along a longitudinal axis 5 of the shoe 1. According to the nomenclature of the claims the toe element 6 is connected with another sole element 4, namely the center element 13. The center element 13 in turn is directly connected with another sole element 4 namely the heel element 7.

The shoe 1 includes a heel compartment 9 which extends approximately parallel to the longitudinal axis 5 of the shoe 1. The heel compartment 9 extends over all into sole elements 4, namely the rear heel element 7 and the additional sole element 4, the center element 13 that is adjacent to the heel element 7. The heel compartment 9 has a length so that a heel 3 of the shoe 1 can be housed completely within the heel compartment 9. Furthermore a depth 26 of the heel compartment 9 exceeds a width 27 of the heel 3. This has the consequence that the heel 3 can be completely received within the heel compartment 9. Therefore the heel 3 does not penetrate with any portion over the shoe sole in a passive position so that the shoe 1 in flat condition contacting the ground flat only contacts the ground with a sole surface 28, but not with the heel 3.

The heel 3 is rotatably arranged at a heel element 7 of the shoe 1 with a joint arrangement 2. Using this joint arrangement 2 the heel is rotate ably between an active position and a passive position, wherein the shoe 1 is its tall position when the heel 3 is in its active position. This tall position is illustrated in FIG. 2.

In the tall position of the shoe 1 the foot surfaces 12 of the sole elements 4 are rotated relative to each other, wherein the heel element 7 and the center element 13 as well as the center element 13 and the toe element 16 respectively enclose an angle 14 with one another. In the illustrated embodiment the toe element 6 and the heel element 7 and the associated foot surfaces 12 are oriented parallel to each other it is appreciated that this embodiment is primarily due to the idealized representation according to FIG. 2. Typically the heel element 7 and the center element 13 and the center element 13 and the toe element 6 enclose different angles in the tall condition of the shoe 1. Thus the angle 14 is 20°.

When the heel 3 is in its passive position the shoe 1 is provided in its flat condition. This flat condition is illustrated by an idealized representation according to FIG. 3. The heel 3 of the shoe 1 is arranged completely within the heel compartment 9. The three heel elements 4 are pivoted relative to each other by the respective joint arrangements 8 so that the foot surfaces 12 of the sole elements 12 are in a common plane. Also here it is appreciated that the completely parallel of the foot surfaces 12 for a shoe 1 in flat condition is not mandatory and primarily due to the idealized representation. Typically the foot surfaces 12 of the individual sole elements 4 are arranged at a particular angle relative to each other also when the shoe 1 is provided in its flat condition.

It is apparent from a comparison of FIGS. 2 and 3 that a heel surface 11 of the heel element 7 is at different distances from the ground as a function of the condition of the shoe 1 when the shoe 1 rests on the ground. In the tall condition of the shoe 1 the distance of the heel surface 11 from the known illustrated ground corresponds approximately to an entire length of the heel 3. When the shoe 1 is provided in a flat condition the heel surface 11 of the heel element 7 and the heel surface of the center element 13 contact the ground directly. This is the case for the sole surface 28 of the toe element 6 anyhow irrespective of the condition of the shoe 1. Consequently not component of the heel 3 is used when the shoe 1 is provided in flat condition.

This has the consequence that a contact surface by which the shoe 1 contacts the ground in the portion of its heel is much smaller when the shoe is provided in its tall condition than in its flat condition. In the instant embodiment the heel 3 has a heel surface 10 of 1 cm² at its lower end that contacts the ground. The heel surface 11 that contacts the ground in a flat condition of the shoe 1 is 25 cm and is consequently 25 times larger than the heel surface 10 of the heel. The link arrangements 8 of the shoe 1 according to the invention are respectively provided in the form of film hinges. The film hinges facilitate rotating the adjacent sole elements 4 relative to each other. The toe element 6 and the center element 13 are connected with each other by a single link arrangement 8.

The link arrangement 8 extends along the entire width of the shoe sole of the shoe 1 in a transition portion 29 of the center element 13 and the toe element 6. Thus it is also conceivable that the link arrangement 8 only covers a portion of the width of a shoe.

In the illustrated embodiment the link arrangement 8 which couples the toe element 6 and the center element 13 with each other are configured rotated about a vertical axis 36 of the shoe 1 and rotated against a longitudinal axis 5 of the shoe 1. This rotation has the consequence that the toe element 6 can rotate relative to the center element 13 about a rotation axis which is also rotated relative to the longitudinal axis of the shoe 1. The orientation or alignment of the link arrangement 8 or the associated rotation axis is ideally configured according to individual properties of a respective foot so that roll off properties of the shoe according to the invention are particularly convenient.

The center element 13 and the heel element 7 are connected with each other by two link arrangements 8. It is evident from FIG. 4 that this is necessary due to the heel compartment 9 in the illustrated embodiment since a single joint arrangement 8 which extends over an entire width of the shoe 1 would block a folding of the heel 3 into the heel compartment 9. The shoe 1 is illustrate in FIG. 1 in a flat condition which is evident from the heel 3 being in its passive position and thus arranged in the heel compartment 9.

In order to fixate the joint arrangement 8 which is arranged between the toe element 6 and the center element 13 a shoe 1 according to the invention can include a special arresting arrangement 37. As a matter of principle it is conceivable that the link device 8 when the shoe 1 is provided in its tall condition and also in its flat condition shall be fixated so that the joint arrangement couples the toe element 6 and the center element 13 with each other torque proof. For the invention it is only significant that in case a center element 13 is provided at all an arresting of the link arrangement 8 is possible when the shoe 1 is provided in is tall condition. When the shoe 1 is provided in its flat condition the link arrangement 8 can either remain loose or can be fixated this is not significant for practicing the invention.

The arresting device 37 is schematically illustrate in FIGS. 5-7, wherein the mechanical principle shall be initially described with reference to FIG. 5. The arresting arrangement 37 cooperates with a slider element 38 which is coupled in a force transferring manner with the center element 13. For this purpose the slider element 38 includes a link 39 that corresponds with the link arrangement 8 which enables the slider 38 to move in the same manner in which the toe element 6 and the center element 13 can move relative to each other. In order to connect the slider element 38 torque proof with the center element 13 the slider element 38 includes a connector 40.

In order to transition the shoe 1 between its tall condition and its flat condition or vice versa a slider element 38 can be used among other things. Thus the slider element 38 is moved relative to the arresting arrangement 37 which changes a position of the slider element 38 relative to the shoe sole, this means the toe element 6 and the center element 13. On the other hand side it is also conceivable that the shoe sole is deformed wherein the position of the slider element 38 changes relative to the shoe sole. A deformation of the shoe sole relative to each other can be performed in particular by a rotation of the sole elements 4 relative to each other. FIG. 5 shows the obtained effect, namely forcing the joint arrangement 8 into a rotated position. The latter corresponds in turn with a corresponding rotation of toe element 6 and center element 13 relative to each other. The slider element is arrest able by the arresting device 37 so that a respective relative position between the slider element 38 and the shoe sole and consequently a particular position of the link arrangement 8 can be conserved. This way the toe element 6 and the center element 13 can be fixed in particular positions relative to each other.

Based on the illustrations according to FIGS. 6 and 7 is evident how the device that has only been described schematically can be implemented in particular. Thus it is conceivable that a compartment is provided in the shoe sole in which the slider element 38 is move ably supported. The slider element 38 includes a recess 42 which is configured to receive an arresting element 43. A cooperation of arresting element 43 and recess 42 is thus only possible in a particular position of the slider element 38. This position corresponds with a tall condition of the shoe 1 according to the invention in which the toe element 6 and the center element 13 are arranged so that they are pivoted relative to each other at an angle of less than 180°. The slider element 38 is connected to the center element 13 in a force transferring manner by a connection 40 so that moving the slider element 38 relative to the toe element 6 causes a direct movement of the center element 13 relative to the toe element 6. The arresting element 43 and the slider element 38 can engage each other at the recess 42 in a form locking manner and can thus define the position of the slider element relative to the toe element 6.

The embodiments according to FIGS. 6 and 7 thus differ in that in FIG. 6 the slider element 38 as well as the shoe sole 38 respectively include a joint 39 or a joint arrangement 8. This principle is also illustrated in FIG. 5. Alternatively it is also conceivable to configure the slider element 38 without the joint 39 and to connect it directly to the link arrangement 8, wherein the slider element 38 and the toe element 6 have to engage at different elevation levels of the joint arrangement 8. It is evident from FIG. 7 that also in this embodiment a movement of the slider element 38 relative to the toe element 6 can cause a rotation of the center element 13 relative to the toe element 6. Alternative mechanisms are certainly also conceivable.

Furthermore FIGS. 8 and 9 illustrate an arresting mechanism for the link arrangement 8 which connects the heel element 7 with the adjacent sole element 4 which is formed in this case by the center element 13. Thus the link arrangement 8 cooperates with the arresting arrangement 46 which is configured to establish a force transferring connection between the heel element 7 and the center element 13. The illustrated arresting arrangement facilitates arresting the heel element 7 and the center element 13 into discreet positions relative to each other wherein the first position corresponds to the flat condition of the shoe 1 and the second position corresponds to the tall condition of the shoe 1. In order to define the positions of the arresting arrangement 46 the arresting arrangement 46 cooperates with a first interlocking position and a second interlocking position 45. The arresting position 46 is thus formed by a bending stiff rod which is connect able at the interlocking positions 44, 45 in a form locking manner with the center element 13. It is evident from FIGS. 8 and 9 that the alternating engagement of the arresting arrangement 46 with the center portion 13 facilitates adjusting and arresting the angle 14 between the heel element 7 and the center element 13 at different interlocking positions 44, 45.

A particular embodiment illustrated in FIG. 9 includes two indentations which are respectively arranged in the center element 13 and which correspond with the two interlocking positions 44, 45 described supra. The arresting arrangement 46 is formed by a bending stiff rod which is connected at the heel element 7 torque proof. At an end oriented towards the center element 13 the arresting arrangement 46 includes a lug 15 that protrudes in a direction perpendicular to the longitudinal axis 5 of the shoe 1 by which the arresting arrangement 46 can engage the indentations at the interlocking positions 44 and 45 in a form locking manner.

In the illustrated embodiment the indentations are provided as cut outs which extended completely through an associated attachment section of the center portion 13. The arresting arrangement 46 engages with its nose from one side at a respective cut out (in FIG. 9C the cut out of the second interlocking position in which the shoe 1 is arranged in its tall condition). From an opposite side of the cut out a push button 47 engages the cut out. The push button 47 is supported by a spring element 48 at the cut out. The push button 47 facilitates in a particularly simple manner to push the lug 15 and therewith the arresting arrangement 46 in its entirety out of the cut out and thus to release the rotation 13 relative to the heel element 7 by the link arrangement 8. The spring element 48 automatically moves the push button 47 back into an actuation position so that the push bottom 47 is useable again.

In an alternative embodiment of the shoe 1 according to the invention the shoe 1 includes a link arrangement 8 which has a different stiffness than the remainder of the shoe sole in this embodiment due to the choice of material and thus represents a non-mechanical but material based joint arrangement 8 wherein an arresting of the respective sole element 4 relative to each other is performed by a combination of tension elements 41 and support arrangements 51. The support arrangements 51 respectively approximately have a semi-circular shape. A respective support arrangement 51 corresponds with a joint arrangement 8 wherein the support arrangements 51 are respectively arranged proximal to the associated joint arrangement 8 in the center portion of the shoe sole. The tension element 41 cooperating with the guide arrangements 51 are respectively supported at two ends, wherein one end is firmly connected with a respective sole element 4 (the one tension element 41 at the toe element 6 and the other tension element 41 at the heel element 7 and the respectively other end engages the associated support device 51. The latter end is move ably supported within the support arrangement 51 so that it is move able from an end position of the semi-circle to an opposite end position and vice versa. The end position of the semi circles of the support arrangements 51 respectively corresponds with the flat condition or the tall condition of the shoe. This is quite evident from FIGS. 10A and 10B. The tension elements 41 are arrest able at the end positions in the support arrangements 51. Advantageously the tension elements 41 interlock at the end positions due to associated arresting rods so that the respective condition of the shoe 1 is arrest able.

The tension elements 41 eventually cause a shortening of the distance between 2 points of the respectively connected sole elements 4, wherein a shortening of the distance coincides with a pivoting of the respective sole elements 4 about the respectively joint arrangement 8. The pivoting as illustrated in FIG. 10B produces the desired result in the form of the typically high heel with a rising center element 13 and at least essentially flat toe and heel elements 6, 7.

The part illustrated in FIG. 10 can be used particularly well in a form of a shoe base, wherein the shoe base can be used particularly well as a base for a shoe super structure and/or shoe base structure. In particular the shoe base includes all essential functions of the shoe 1 according to the invention, namely in particular adjustability of the individual components, thus formed by the sole elements 4 relative to each other and a heel compartment not illustrated in FIG. 10 for receiving a heel 3. The shoe base can be used particularly well in a sole inlay and can thus be used particular well as a base for various shoes.

The heel 3 is arranged by a joint arrangement 2 at the heel element 7 and rotate able relative to the heel element 7. A detail of this joint arrangement 2 can be derived from FIG. 11. The joint arrangement 2 includes in turn a proper cam 15 which is supported with its 2 end sections in an associated recess 19 of the heel element 7. The shaft 15 is rotatably supported in the recess 19 and rotate able about a longitudinal axis 18 of the shaft 15. The shaft 15 includes a groove 17 which is configured to engage the shoulder 3 with a corresponding interlocking pin 16. The interlocking pin 16 is arranged at an upper end of a bolt 35 which is arranged axially move able within a support shaft 23 of the shoulder 3.

The linear movability of the bolt 25 facilitates moving the interlocking pin 16 between a clear position and an arresting position. Thus the bolt 25 cooperates with a spring 20 which presses the bolt 25 and thus the interlocking pin 16 into its arresting position. Along a longitudinal axis of the bolt 25 the bolt 25 includes a radially extending recess 21 which is configured to cooperate with a push button 24. The push button 24 as well as the recess 21 include corresponding contact surfaces that are inclined relative to the longitudinal axis of the bolt 25. The contact surfaces cause the bolt 25 to be moved against the spring force of the spring 20 along the support shaft 23 when the push button 25 moves into o the recess 21. During the movement of the bolt 25 the interlocking pin 16 is moved from its arresting position into its free position. Put differently the interlocking pin 16 is pulled out of the groove 17 of the shaft 15 so that the interlocking pin does not engage the shaft 15 any longer.

In the idle position of the interlocking pin 16 the shaft 15 is therefore not blocked and is thus freely rotate able about its longitudinal axis 18. The bolt 25 is fixable by a positioning device 22 in two positions, namely the idle position and the arresting position.

Another embodiment of a joint arrangement is illustrated in FIG. 2, wherein the illustration includes a joint arrangement 8 by which adjacent sole elements 4 of the shoe 1 are arrest able relative to each other. The basic mechanism of the joint arrangement 8 is identical with the basic mechanism of the joint arrangement 2 described supra. In particular the bolt 25 is move able in its support shaft 23 by actuating the push button 24 so that the interlocking pin 16 is move ably between its idle position and its arresting position. Thus the sole element 4 thus the heel element 7 and the center element 14 can be disengaged by simple actuation of the push button 24 and interlocked again. Switching the shoe 1 between a tall condition and a flat condition is thus possible in a particularly simple manner.

Advantageously the groove 17 of the shaft 15 of the joint arrangement 8 is configured so that the joint arrangement is rotate able about its longitudinal axis in a partial angle range in spite of the interlocking pin 16 being provided in its arresting position. This way the adjacent sole elements 4 are not connected with each other in a completely stiff manner in spite of the interlocking pin 16 being provided in its arresting position but the adjacent sole elements 4 have a particular clearance. This can have a particularly positive effect upon wear comfort of the shoe 1 according to the invention.

The heel compartment 9 of the shoe 1 according to the invention can be covered by a cover element so that the heel compartment 9 is essentially protected against penetration of contaminants etc. FIGS. 13-15 illustrate a shoe 1 according to the invention in an exemplary manner wherein a heel compartment 9 of the shoe cooperates with two cover elements 31, 35. The cover element 31, 35 are jointly configured to close the heel compartment 9 substantially tight. In particular the cover elements 31, 35 essentially prevent a penetration of contaminants into the heel compartment 9. Furthermore the cover elements 31, 35 protect the heel 3 against being damaged for example by pieces of gravel on the ground.

The heel compartment 9 extends over to adjacent sole elements 4 namely the center element 13 and the heel element 7. Accordingly the heel compartment 9 includes 2 sections wherein a first section extends in the center element 13 and a second section extends in the heel element 7. The cover elements 31, 35 respectively cooperate with the one of the sections of the heel compartment 9, the cover element cooperates with the heel element 7 and the cover element 35 cooperates with the center element 13.

The cover elements 31, 35 are respectively attached at the shoe 1 by attachment devices 30. In order to move the heel 3 from its passive position into its active position starting from the flat condition of the shoe 1, the cover elements 31, 35 or their attachment arrangements 30 are disengaged so that the cover elements 31, 35 are move able relative to the shoe sole 1. This way the heel compartment 9 is release able so that the heel 3 can be retrieved from the heel compartment 9.

A tall condition of the shoe 1 according to the invention is illustrated in FIG. 14. For reasons of simplicity the illustration does not include the heel 3 disposed in its active position. The heel 3 is pivot able by a non-illustrated joint arrangement 2 between a passive position and an active position. An upper end section of the heel 3 is still within the heel compartment 9 when the heel is provided in its active position. This has the consequence that the cover element 31 of the heel element 7 in this position of the heel 3 cannot be brought into its closing position in which it closes the heel compartment 9 in the portion of the heel element 7.

Thus the cover element 31 is positioned within the heel compartment 9 when the shoe 1 is in its tall condition so that the cover element 31 does not protrude beyond a lower sole surface of the shoe sole and furthermore releases the heel compartment 9 in the portion of the heel element 7.

When the shoe 1 is provided in its flat condition the cover elements 31, 35 terminate flush with the sole surface 28 of the shoe 1. Put differently a bottom side of the cover elements 31 oriented towards the ground is typically always in direction contact with the ground when also the respective corresponding sole surface 28 of the shoe 1 is in contact with the ground.

In an advantageous embodiment of the shoe 1 according to the invention the cover elements 31, 35 are configured rotate able about their longitudinal axis. This way it is possible when the shoe 1 is provided in its flat condition to turn an operating side or active side of the cover elements 31, 35 downward so that this side of the cover elements 31, 35 comes in contact or can come in contact with the ground. When transitioning the shoe from its flat condition into its tall condition the cover elements 31, 35 can be rotated so that a back side or passive side becomes visible. This side does not come in contact with the ground and therefore does not have any damages in the form of typical wear patters of a shoe sole. This way the heel compartment 9 can be closed with optically appealing cover elements 31, 35 when the shoe 1 is provided in its tall condition.

The detail according to FIG. 16 describes an additional or supplemental option to arrest the heel 3 at the heel element 7 of the shoe 1 according to the invention. Thus it is the basic idea to configure the heel 3 rotate able about a horizontal rotation axis that is perpendicular to the longitudinal axis 15 of the shoe 1, wherein a fixing of the heel 3 in an active position and in a passive position is provided by form locking engagement with stop elements. Thus the shoe 1 includes a rear heel stop 50 which can be configured particularly well at the heel element 7. The heel stop 50 represents a type of “stopper” for the heel and stops a movement of the heel 3 about its rotation axis beyond a particular position. This position forms the active position of the heel 3 in which the heel 3 contacts the ground at least in a substantial orthogonal manner advantageously in a completely orthogonal manner. In order to arrest the heel 3 in its active position the shoe 1 includes an additional stop element 49. The stop element 49 is formed by a radially slotted disc, wherein a width of the slot is adapted to the heel 3. The stop element 49 is move ably arranged at the shoe 1. In particular it is conceivable that the stop element 49 is configured rotate able and remove able. In this case the stop element 49 can be arranged at the shoe in its active position in order to arrest the heel 3 so that the stop element 49 blocks a movement of the heel 3 starting from its active position in a direction towards its passive position. The associated position of the stop element 49 is derive able from FIG. 16B. In this position the heel 3 can rotate about its rotation axis, neither to the rear nor to the front since the heel is blocked on both sides namely towards one side by the heel stop 50 and towards the other side by the stop element 49. In order to release the movement of the heel 3 the stop element 49 can be moved back into its release position, in particular rotated and can release the heel 3 again so that the heel 3 can be transitioned into its passive position, FIG. 16A.

FIG. 17 illustrates an embodiment of a heel 3 formed by two heel elements 33, 34. The two heel elements 33, 34 are connect able with each other along a separation surface 32. The heel 3 can be transitioned between its operating position and a storage position by disengaging a connection between the two heel elements 33, 34.

In the illustrated embodiment the heel element 33 is partially support able within the other heel element 34, wherein the heel element 33 only protrudes beyond the heel element 34 with a small portion of its volume. This has the effect that the heel 33 has a smaller exterior volume in its stored condition than in its operating condition. In the illustrated embodiment the outer volume of the heel 3 provided in its stored condition is 85% of the outer volume of the heel 3 that is provided in its operating condition.

The components and combinations described with reference to the embodiment are not limiting the spirit and scope of the invention. To the contrary it is easy for a person skilled in the art to combine each individual exemplary feature with all other conceivable embodiments of the remaining features.

REFERENCE NUMERALS AND DESIGNATIONS

-   -   1 shoe     -   2 joint arrangement     -   3 heel     -   4 sole element     -   5 longitudinal axis     -   6 toe element     -   7 heel element     -   8 joint arrangement     -   9 heel compartment     -   10 heel surface     -   11 shoe heel surface     -   12 foot surface     -   13 center element     -   14 angle     -   15 lug     -   16 interlocking pin     -   17 groove     -   18 longitudinal axis     -   19 recess     -   20 spring     -   21 recess     -   22 positioning device     -   23 support shaft     -   24 push button     -   25 bolt     -   26 depth     -   27 width     -   28 sole surface     -   29 transition portion     -   30 attachment device     -   31 cover element     -   32 separation surface     -   33 heel element     -   34 heel element     -   35 cover element     -   36 vertical axis     -   37 arresting arrangement     -   38 slider element     -   39 joint     -   40 connection     -   41 tension element     -   42 recess     -   43 arresting element     -   44 first interlocking position     -   45 second interlocking position     -   46 arresting arrangement     -   47 push button     -   48 spring element     -   49 stop element     -   50 heel stop     -   51 support arrangement 

What is claimed is:
 1. An adjustable shoe configured to stand on a base surface, the adjustable shoe comprising: at least one shoe sole; and at least one heel, wherein the at least one shoe sole is divided respectively into at least two shoe sole elements which are arranged at least indirectly behind one another in a longitudinal direction of the at least one shoe sole, wherein the at least two shoe sole elements include a toe element and a heel element, wherein adjacent shoe sole elements of the at least two shoe sole elements are respectively connected with each other by at least one joint arrangement, wherein the adjacent sole elements are pivotable relative to one another through the at least one joint arrangement, wherein at least the heel element and at least one shoe sole element which is adjacent to the at least one heel element are connectable torque-proof in at least one interlocking position in a tall condition of the adjustable shoe, wherein the at least one heel is movable relative to the at least one shoe sole at least between an active position and a passive position so that the adjustable shoe is adjustable at least between the tall condition and a flat condition, wherein the at least one shoe sole includes a heel compartment in which the at least one heel is storable in the passive position of the heel, wherein a shoe heel surface which is arranged at a bottom side of the heel element and which faces the base surface is offset from the base surface in the active position of the at least one heel in which the at least one heel is arranged in a force transmitting manner at least at the at least one heel element and contacts the base surface with a heel surface, and wherein the shoe heel surface is in direct contact with the base surface in the passive position of the at least one heel.
 2. The adjustable shoe according to claim 1, wherein the at least one heel is arranged at a remaining shoe when the at least one heel is provided in the passive position so that the at least one heel is completely protected from a direct contact with the base surface.
 3. The adjustable shoe according to claim 1, wherein at least 70%, or at least 80% or at least 90% of a sole surface of the at least two shoe sole elements is in direct contact with the base surface in the flat condition of the adjustable shoe.
 4. The adjustable shoe according to claim 1, wherein the at least one shoe sole is divided into at least three shoe sole elements including the toe element, a center element and the heel element, and wherein the center element is arranged in the longitudinal direction of the shoe sole between the toe element and the heel element.
 5. The adjustable shoe according to claim 1, wherein the heel compartment extends at least in two shoe sole elements, or in the heel element and a shoe sole element that is adjacent to the heel element, or in the heel element and a center element.
 6. The adjustable shoe according to claim 1, wherein the shoe heel surface by which the adjustable shoe rests in the flat condition on the base surface has at least 5 times a size, or 10 times a size, or 20 times a size of the heel surface by which the heel of the adjustable shoe rests on the base surface in the tall position of the adjustable shoe.
 7. The adjustable shoe according to claim 1, further comprising: at least one cover element configured to cover the heel compartment, wherein a bottom side of the at least one cover element that is oriented towards the base surface terminates flush with a sole surface of the adjustable shoe sole that is oriented towards the base surface.
 8. The adjustable shoe according to claim 7, wherein the at least one cover element is movable relative to a remainder of the adjustable shoe, or configured rotatable so that the at least one cover element is orientable towards the base surface in a tall condition of the adjustable shoe and in a flat condition of the adjustable shoe respectively with different surfaces of the at least one cover element.
 9. The adjustable shoe according to claim 1, wherein at least the toe element and a shoe sole element adjacent to the toe element are fixable relative to each other at least in an angled position of the joint arrangement that connects the toe element and the shoe sole element adjacent to the toe element, and wherein base surfaces of the toe element and base surfaces of the shoe sole element adjacent to the toe element are arranged at an angle of less than 180°, or less than 170°, or less than 160° in an angled position of the joint arrangement.
 10. The adjustable shoe according to claim 9, wherein the toe element and the shoe sole element adjacent to the toe element are freely rotatable relative to each other within a partial angle range in the angled position of the joint arrangement, and wherein the partial angle range is 55° at the most, or 45° at the most, or 35° at the most.
 11. The adjustable shoe according to claim 1, further comprising: at least one slider element that cooperates with at least two shoe sole elements and that is movable relative to at least one shoe sole element, advantageously at least essentially parallel to the longitudinal direction of the adjustable shoe, wherein a movement of the slider element causes a variation of a distance between locations of adjacent sole elements so that adjacent sole elements perform a relative movement or a rotation caused by the respective joint arrangement cooperating with the respective sole elements during a movement of the slider element, and wherein the slider element is fixable in at least one position so that a relative movement between respective sole elements is prevented.
 12. The adjustable shoe according to claim 1, wherein at least one joint arrangement, or at least the joint arrangement by which the toe element is connected with the sole element that is adjacent to the toe element is rotatable relative to a vertical axis of the adjustable shoe and movable parallel to the longitudinal axis of the adjustable shoe so that the adjustable shoe is adjustable to individual properties of a foot of a person wearing the adjustable shoe.
 13. The adjustable shoe according to claim 1, wherein the at least one heel is made from at least two heel elements which are movable relative to each other at least when the at least one heel is in the passive position so that the at least one heel is movable between an operating position and a storage position, and wherein an outer volume of the at least one heel in the storage position is smaller than an outer volume of the at least one heel in the operating position.
 14. The adjustable shoe according to claim 13, wherein an outer volume of the at least one heel in the storage condition is 90% at the most, or 80% at the most, or 70% at the most of an outer volume of the at least one heel in the operating position of the at least one heel. 